The Carina Nebula at 30 MHz

Abstract

A map of the Carina nebula, with 50' arc resolution, has been made using the 30 MHz aperture synthesis telescope at Fleurs. At this frequency the nebula appears in absorption. A strong nonthermal source, presumably a supernova remnant, has been found in front of the nebula. Estimates of the emissivity in this region from brightness temperatures are found to vary markedly over the extent of the nebula. The average measured emissivity is lower than that in the local arm, suggesting the presence of an interarm gap between the Sun and the nebula.